feat: Use conda-forge cross-compilation to improve the build process

[matthewfeickert]

• Use the cross-compilation selector, '[build_platform != target_platform]', to simplify the build process by just doing a pip install.
  • c.f. https://conda-forge.org/docs/maintainer/knowledge_base/#details-about-cross-compiled-python-packages
• Add the cross-python and python build dependency.
• Remove the python-build host dependency.
• Bump the build number.

Checklist

• Used a personal fork of the feedstock to propose changes
• Bumped the build number (if the version is unchanged)
• Reset the build number to 0 (if the version changed)
• Re-rendered with the latest conda-smithy (Use the phrase @conda-forge-admin, please rerender in a comment in this PR for automated rerendering)
• Ensured the license file is being packaged.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• This recipe is using a compiler, which now requires adding a build dependence on {{ stdlib("c") }} as well. For further details, please see META: {{ stdlib("c") }} migration conda-forge.github.io#2102.

[matthewfeickert]

@conda-forge-admin, please rerender

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

I do have some suggestions for making it better though...

For recipe:

• This recipe is using a compiler, which now requires adding a build dependence on {{ stdlib("c") }} as well. For further details, please see META: {{ stdlib("c") }} migration conda-forge.github.io#2102.

[matthewfeickert]

@conda-forge/help-python trying to add the requested

   build:
     - {{ compiler('c') }}
     - {{ compiler('cxx') }}
+    - {{ stdlib("c") }}
     - cross-python_{{ target_platform }}    # [build_platform != target_platform]
     - python                                # [build_platform != target_platform]
     - autoconf

results in the following "nothing provides requested c_linux-64" traceback :

Traceback (most recent call last):
  File "/opt/conda/lib/python3.10/site-packages/boa/cli/mambabuild.py", line 142, in mamba_get_package_records
    _, link_precs = solver.solve_for_unlink_link_precs(_specs, prefix)
  File "/opt/conda/lib/python3.10/site-packages/boa/core/solver.py", line 244, in solve_for_unlink_link_precs
    t = self.solve(specs)
  File "/opt/conda/lib/python3.10/site-packages/boa/core/solver.py", line 234, in solve
    raise RuntimeError("Solver could not find solution." + error_string)
RuntimeError: Solver could not find solution.Mamba failed to solve:
 - gcc_linux-64 12.*
 - automake
 - make
 - c_linux-64
 - libtool
 - autoconf
 - gxx_linux-64 12.*
 - patch
 - swig

with channels:

The reported errors are:
- Encountered problems while solving:
-   - nothing provides requested c_linux-64
-

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/opt/conda/bin/conda-mambabuild", line 10, in <module>
    sys.exit(main())
  File "/opt/conda/lib/python3.10/site-packages/boa/cli/mambabuild.py", line 301, in main
    call_conda_build(action, config)
  File "/opt/conda/lib/python3.10/site-packages/boa/cli/mambabuild.py", line 273, in call_conda_build
    result = api.build(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/api.py", line 250, in build
    return build_tree(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/build.py", line 3762, in build_tree
    packages_from_this = build(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/build.py", line 2436, in build
    output_metas = expand_outputs([(m, need_source_download, need_reparse_in_env)])
  File "/opt/conda/lib/python3.10/site-packages/conda_build/render.py", line 923, in expand_outputs
    for output_dict, m in deepcopy(_m).get_output_metadata_set(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/metadata.py", line 2613, in get_output_metadata_set
    conda_packages = finalize_outputs_pass(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/metadata.py", line 949, in finalize_outputs_pass
    fm = finalize_metadata(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/render.py", line 645, in finalize_metadata
    build_unsat, host_unsat = add_upstream_pins(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/render.py", line 460, in add_upstream_pins
    build_deps, build_unsat, extra_run_specs_from_build = _read_upstream_pin_files(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/render.py", line 439, in _read_upstream_pin_files
    deps, precs, unsat = get_env_dependencies(
  File "/opt/conda/lib/python3.10/site-packages/conda_build/render.py", line 152, in get_env_dependencies
    precs = environ.get_package_records(
  File "/opt/conda/lib/python3.10/site-packages/boa/cli/mambabuild.py", line 151, in mamba_get_package_records
    raise err
conda_build.exceptions.DependencyNeedsBuildingError: Unsatisfiable dependencies for platform linux-64: {MatchSpec("c_linux-64")}

Do you have any advice here?

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[matthewfeickert]

@conda-forge-admin, please rerender

[matthewfeickert]

Ah okay, this required a rerender to work. In that case, I want to keep things atomic, so I'm going to put this back into draft, and open up a seperate PR (PR #7) that is just doing the stdlib c bit.

[matthewfeickert]

@conda-forge-admin, please lint

[conda-forge-webservices]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipe) and found it was in an excellent condition.

[matthewfeickert]

@conda-forge-admin, please rerender

[github-actions]

Hi! This is the friendly automated conda-forge-webservice.

I tried to rerender for you, but it looks like there was nothing to do.

This message was generated by GitHub actions workflow run https://github.com/conda-forge/fastjet-feedstock/actions/runs/9037803728.

[matthewfeickert]

@conda-forge/fastjet This is actually ready for review now.